參數(shù)資料
型號(hào)： R5F21112FP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32
封裝： 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁(yè)數(shù)： 11/32頁(yè)
文件大?。?/td> 343K
代理商： R5F21112FP
R8C/11 Group
5. Electrical Characteristics
Rev.1.60
Jan 27, 2006
page 17 of 26
REJ03B0034-0160
Figure 5.3 Reset Circuit Electrical Characteristics
Vpor1
Vcc min
Vdet(3)
tw(por1) tw(Vpor1–Vdet)
Sampling time(1, 2)
Internal reset signal
(“L” effective)
fRING-S
1
X 32
fRING-S
1
X 32
Vpor2
NOTES:
1. Hold the voltage of the microcomputer operation voltage range (Vccmin or above) within sampling time.
2. A sampling clock is selectable. Refer to “5.4 Voltage Detection Circuit” of Hardware Manual for details.
3. Vdet shows the voltage detection level of the voltage detection circuit. Refer to “5.4 Voltage Detection Circuit” for details.
4. Refer to “Table 16.6 Reset Circuit Electrical Characteristics” for electrical characteristics.
tw(por2) tw(Vpor2 –Vdet)
Table 5.6 Reset Circuit Electrical Characteristics (When Using Hardware Reset 2(1, 3))
Symbol
Standard
Typ.
Unit
Measuring condition
Min.Max.
Parameter
Vpor2
Power-on reset valid voltage
V
Vdet
NOTES:
1. The voltage detection circuit which is embedded in a microcomputer is a factor to generate the hardware reset 2. Refer to 5.1.2 Hardware
Reset 2 of Hardware Manual for details.
2. This condition is not applicable when using with Vcc
≥ 1.0V.
3. When turning power on after the external power has been held below the valid voltage (Vpor1) for greater than 10 seconds, refer to Table 5.7
Reset Circuit Electrical Characteristics (When Not Using Hardware Reset 2).
4. tw(por2) is time to hold the external power below effective voltage (Vpor2).
Supply voltage rising time when power-on reset is canceled(2)
tW(Vpor2-
Vdet)
ms
100
–20°C
≤ Topr < 85°C
–20°C
≤ Topr < 85°C, tW(por2) ≥ 0s(4)
Table 5.7 Reset Circuit Electrical Characteristics (When Not Using Hardware Reset 2)
Symbol
Standard
Typ.
Unit
Measuring condition
Min.Max.
Parameter
0.1
NOTES:
1. When not using hardware reset 2, use with Vcc
≥ 2.7V.
2. tw(por1) is time to hold the external power below effective voltage (Vpor1).
100
1
tW(Vpor1-
Vdet)
Supply voltage rising time when power-on reset is canceled
0.5
tW(Vpor1-
Vdet)
Supply voltage rising time when power-on reset is canceled
tW(Vpor1-
Vdet)
Supply voltage rising time when power-on reset is canceled
V
Vpor1
Power-on reset valid voltage
ms
tW(Vpor1-
Vdet)
Supply voltage rising time when power-on reset is canceled
100
ms
0°C
≤ Topr ≤ 85°C, tW(por1) ≥ 10s(2)
–20°C
≤ Topr < 0°C, tW(por1) ≥ 10s(2)
0°C
≤ Topr ≤ 85°C, tW(por1) ≥ 1s(2)
–20°C
≤ Topr < 85°C
–20°C
≤ Topr < 0°C, tW(por1) ≥ 30s(2)
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